Cooling; Diagnostics; Figure 8.1-2: Side View Of Typical Model 903 Remote Card Cage - Moog 903 User Manual

903-0623-00 Rev. A

Figure 8.1-2: Side View of Typical Model 903 Remote Card Cage

8.2

Cooling

Forced air cooling of the Model 903 modules is necessary to maintain the warranty. Modules used inside
enclosures such as ROV electronics cases, must be cooled using forced convection. Air cooling extends
the ambient temperature range of operation and lifetime of the active components.
Each remote and console unit has a DC fan located on the top of the module. The fan is connected to DC
power (MOLEX: 22-01-3027) on the backplane board. Fans can be removed as long as other devices are
present to provide the same circulation and forced air cooling.
8.3

Diagnostics

Model 903 system diagnostics is available via the 10/100 Mbps Ethernet port (RJ-45) of the FMB-X-2.5
cards as Modbus TCP/IP or through an embedded web server. Diagnostic packets are handled as low
priority and must be pulled by an external computer. When accessed, diagnostic packets use up less than
0.1 % of the Ethernet channel capacity. Diagnostic information can also be obtained via the RS-232 port
(3.5 mm stereo jack) of the FMB-X-2.5. The RS-232 port on the FMB-X-2.5 is for diagnostic purposes
only and is provided for backwards compatibility with old FMB systems and for advanced configuration of
the 903 system.
Typical system diagnostic information includes the following:

System power supply voltages at both the remote and console modules

Temperature on the board surface of each FMB-X-2.5

Condition of the two optical links between the two modules (including transmitted and received
optical power)

Presence of valid data and composite video signals at both the console and remote ends of the
system.
Please refer to the FMB-X-2.5 diagnostics manual (P/N: 903-0622-00) for further details on the diagnostic
capabilities of the Model 903 system.
Focal Technologies Corp.
Model 903 User's Guide, FMB-X-2.5 Version
Page 8-2